sending and processing responses

dnstp-client/src/main.rs

@@ -5,6 +5,10 @@ use std::time::Duration;
 use clap::Parser;
 use log::{error, info, LevelFilter};
 use simplelog::*;
+use dnstplib::dns_socket::DNSSocket;
+use dnstplib::raw_request::NetworkMessage;
+use dnstplib::request_processor::RequestProcesor;
+use dnstplib::response_processor::ResponseProcesor;
 
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
@@ -24,18 +28,32 @@ fn main() {
 
     let address = SocketAddr::from(([127, 0, 0, 1], 0));
 
-    match UdpSocket::bind(&address) {
+    let mut socket = DNSSocket::new(vec!(address));
-        Ok(s) => {
+    socket.bind();
+    socket.run_tx();
+
+    let tx_channel = socket.get_tx_message_channel().unwrap();
+
+    let mut processor = ResponseProcesor::new();
+    processor.run();
+
+    socket.run_rx(processor.get_message_channel().expect("couldn't get message processing channel"));
+
     loop {
 
         info!("sending...");
 
-                let send_buf = "hello world";
+        let mut send_buf = [0; 512];
-                let send_res = s.send_to(send_buf.as_bytes(), "127.0.0.1:5000");
+        send_buf[0] = 'a' as u8;
+        send_buf[1] = 'b' as u8;
+        send_buf[2] = 'c' as u8;
+        send_buf[3] = 'd' as u8;
+
+        tx_channel.send(Box::from(NetworkMessage {
+            buffer: Box::from(send_buf),
+            peer: "127.0.0.1:5000".parse().unwrap()
+        }));
 
         thread::sleep(Duration::from_secs(1));
     }
 }
-        Err(e) => error!("couldn't bind to address {}", e)
-    }
-}

dnstp-server/src/main.rs

@@ -41,6 +41,7 @@ fn main() {
         .collect();
 
     let mut socket = DNSSocket::new(addresses);
+    socket.bind();
     socket.run_tx();
 
     let mut processor = RequestProcesor::new();

dnstp/src/dns_socket.rs

@@ -10,6 +10,7 @@ use crate::raw_request::{NetworkMessage, NetworkMessagePtr};
 
 pub struct DNSSocket {
     addresses: Vec<SocketAddr>,
+    socket: Option<Box<UdpSocket>>,
     rx_thread: Option<JoinHandle<()>>,
     rx_thread_killer: Option<Sender<()>>,
     tx_thread: Option<JoinHandle<()>>,
@@ -22,6 +23,7 @@ impl DNSSocket {
     {
         DNSSocket {
             addresses,
+            socket: None,
             rx_thread: None,
             rx_thread_killer: None,
             tx_thread: None,
@@ -41,11 +43,21 @@ impl DNSSocket {
     //     }
     // }
 
-    fn bind(&mut self) -> Option<UdpSocket>
+    pub fn bind(&mut self)
     {
         match UdpSocket::bind(&self.addresses[..]) {
-            Ok(s) => Option::from(s),
+            Ok(s) => {
-            Err(_) => None
+                self.socket = Option::from(Box::from(s));
+            },
+            Err(_) => {}
+        };
+    }
+
+    fn get_socket_clone(&mut self) -> Option<Box<UdpSocket>>
+    {
+        match &self.socket {
+            Some(s) => Option::from(Box::from(s.try_clone().unwrap())),
+            None => None
         }
     }
 
@@ -53,7 +65,7 @@ impl DNSSocket {
     {
         let (tx, rx): (Sender<()>, Receiver<()>) = mpsc::channel();
         self.rx_thread_killer = Some(tx);
-        let socket = self.bind();
+        let socket = self.get_socket_clone();
 
         self.rx_thread = Some(thread::spawn(move || {
 
@@ -103,13 +115,21 @@ impl DNSSocket {
         let (msg_tx, msg_rx): (Sender<NetworkMessagePtr>, Receiver<NetworkMessagePtr>) = mpsc::channel();
         self.tx_message_channel = Option::from(msg_tx);
 
+        let socket = self.get_socket_clone();
+
         self.tx_thread = Some(thread::spawn(move || {
 
+            match socket {
+                None => {
+                    error!("no socket created, failed to bind to address")
+                }
+                Some(s) => {
                     let mut cancelled = false;
                     while !cancelled {
 
                         for m in &msg_rx {
                             info!("sending [{}] to [{}]", str::from_utf8(&(*(*m).buffer)).unwrap(), (*m).peer);
+                            s.send_to(&(*m.buffer), m.peer);
                         }
 
                         cancelled = match rx.try_recv() {
@@ -117,6 +137,8 @@ impl DNSSocket {
                             _ => false
                         }
                     }
+                }
+            }
 
             info!("socket tx thread finishing")
         }));

dnstp/src/lib.rs

@@ -2,4 +2,5 @@ pub mod dns_socket;
 pub mod request_parser;
 mod dns_header;
 pub mod request_processor;
-mod raw_request;
+pub mod response_processor;
+pub mod raw_request;

dnstp/src/response_processor.rs

@@ -0,0 +1,46 @@
+use std::sync::mpsc;
+use std::sync::mpsc::{Receiver, Sender};
+use std::thread;
+use log::info;
+use std::str;
+use crate::raw_request::NetworkMessagePtr;
+
+pub struct ResponseProcesor {
+    message_channel: Option<Sender<NetworkMessagePtr>>
+}
+
+impl ResponseProcesor {
+    pub fn new() -> ResponseProcesor {
+        ResponseProcesor{
+            message_channel: None
+        }
+    }
+
+    pub fn run(&mut self)
+    {
+        let (tx, rx): (Sender<NetworkMessagePtr>, Receiver<NetworkMessagePtr>) = mpsc::channel();
+        self.message_channel = Some(tx);
+
+        thread::spawn(move || {
+
+            for mut m in rx
+            {
+                info!("processing: {}", str::from_utf8(&(*(*m).buffer)).unwrap());
+
+                // (*(*m).buffer).reverse();
+
+                // match sending_channel.send(m) {
+                //     Ok(_) => {}
+                //     Err(_) => {}
+                // }
+            }
+
+            info!("message processing thread finishing")
+        });
+    }
+
+    pub fn get_message_channel(&mut self) -> Option<Sender<NetworkMessagePtr>>
+    {
+        self.message_channel.clone()
+    }
+}